Fixed ratio 42mm epicyclic geared motors re 975 mfa 975d1041 epicyclic metal gearbox 1041 gear ratio planetary gear 6 to 12v voltage rating 413w power rating 7000rpm no load speed 5700rpm maximum speed 55a load current 20000g cm maximum continuous torque 60000g cm stall torque 446mm diameter 8mm shaft diameter 133mm long 632g weight robust unit boasts a powerful high quality motor sintered bronze bearings high torque transfer from the motor to the gearbox efficiency can